In my course on the Trinity here at the seminary, I have, for many years, been using Joseph Ratzinger’s book Introduction to Christianity. In the pages of that text, our new pope presents the Trinity in terms of three theses: God’s transcendence of the unity/diversity polarity; God’s radical personhood; and the metaphysical primacy of relationality. In this sermon for Trinity Sunday, I will spell out briefly the meaning of each of these assertions.
